Spring vibration dampener



Feb; 4, 1930. w. H. MANNING 1,746,220

- SPRING VIBRATION DAMPENER Filed Sept. 20, 1928 amnion Patented Feb. 4, 1930 :U'N'I'TED STATES,

PATENT OFFICE WILLIAM H. MANNING, OF PONTIAC MICHIGAN, ASSIGNOR T GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A; OORI'ORATIONOF DELAWARE SPRING VIBRATION DAMPENER Application filed September 20, 1928.. Serial No. 307,252.

This invention relates to a device for dampening spring surge. In the present embodiment of the invention, there is provided a dampener comprising spring tongues which are spread outwardly by the insertion of a sisting sidewise deformation thereof, and to also restrict spring surge.

One of the objects of the invention is to provide a device that is active in the elimination of the'inception of induced sympathetic vibrations by means of ap lied friction.

It is a further object o the invention to provide a device that may be easily and accurately manufactured at small cost and readily applied for use, and which will be 2 efllcient in action without requiring attention or adjustment and unlikely to get out of order. I p

Additional objects and advantages will be apparent from the following specification,

taken in connection with the accompanying drawings, wherein Figure 1 is a sectional.

view of a portion of an internal combustion engine illustrating the application of the invention to a valve spring. Figure 2 is a sectional view taken on line 22 of Figure 1,

and Figure 3 is a detail view partly in section of the device in which the spring is contained. 3 In the drawing, the reference character 1 combustion engine having a removable head 2 that provides the combustion chamber over the reciprocating piston 3. A valve 4, which 40 may be either the intake or exhaust valve, controls communication between the combus tionehamber and the intake or exhaust passage'way 5, as the case may be, and has a stem 6 slideable through the sleeve or guide 7, and carries at its lower end a disc or washer 8,

that forms a bearing or seat for the expansible coil spring 9 surroundingthe valve stem. The opposite end of the spring bears or seats against a fixed part of the cylinder block 1 and the tension of the spring serves to hold 5 indicates the cylinder block of an internal the valve on its seat. The valve is moved to open position against spring tension, by conventional valve operating mechanism, comprising a tappet l0 acting on the bottom of the valve stem 6, and a cam 11 on a rotating shaft 12, that is driven ofi the engine crank shaft, as will be readily understood.

'Surrounding the coil spring 9 is a container comprising a ring 13 interposed and held between the upper. end of the coil spring and its fixed seat, and a pair of oppositely disposed arcuate limbs or dependent'tongu'e's 14 having flared extremities 15, to facilitate the introduction of the spring. The container maybe formed of spring material or the like to substantially the shape illustrated by the full lines in Fig. 3. Upon insertion of the coil spring, the 'spring tongues 14 are spread outwardly to the dotted line position, at which time they exert their tension laterally against the sides of the coils, thereby serving to yieldingly resist any tendency for the spring to buckle or deform laterally. Furthermore,the frictional'contact between the tongues 14; and coils of the valve spring, is such as torestrict movement of the coils to an advantageous extent, whereby vibratory reactions aredamped out and the tendency toward spring surge and the building up of vibratory per1ods is eliminated. 'This restriction, by reason of the frictional contact, of course, is not suflicient to destroy the normal function of the spring,in urging the valve head toward its seat. The resiliency of the spring tongues readily permits expansion of the valve spring when its coils are compressed iby the lifting action of the valve operating mechanism.

It will be apparent that the application of the invention to a valve spring is principally for illustrative purposes, as the device may also be used to advantage with various other types of springs.

While the preferred embodiment of the invention has been described more or less .specifical1y, it is to be understood that the invention is not limited to the exact details referred to but that such modifications may be made as come within the scope of the appended claims.

' 49 hearing, and'integn: f to lgel distortion of the ring co g between relativel movable D bet ween relatively movable I claim:

1. In an internal combustion en f e, the combination of a valv an expansib e spring adapted to act on sai valve and a spring element adapted to contact with and ofier a yielding resistance to thesurging tendency of said valve spring 2. In an interns combustion engine the fi combination of a valve having a stem an exlo pansible spring surrounding the stem and active ereon, and a spring elementexerting its tension laterally against said valve spring. 8. In an internal combustion engine, the

, combination of a valve havin a stem, a coil is spring active on said stem, an sprin means bearing laterall against the coils of t e valve sp "to ,yieltfingly resist sidewise deflectlon-t ereo p I 4. In an internal combustion engine, the go combination of a valve having a stem, an ex pansible coil spring surrounding the stemand active thereon, and meansen 1 the coils of said spring and offering frictional resistancetospringsurge. w

as 5. In an internal combustion engine, the combination of a valve having a stem, an expansible coil spring surrounding the stem and active thereon, and a member surrounds ing said coil spring and having contractible ac spring tonguesfor engagement with the coils of the valve sprin 6. In an intermfi combustion engine, the

combination of a valve having a stem, an ex-' ansible coil spring surrounding said stem, a 85 xed bearing for one end of said spring, a bear-in for the opposite end of the spring can: at for said sprin including a ring sec'u resume and o the spring and its adjacent l :gring tong-pies extendt s y resist ing besidev and a p 7. In a device the character described by said stem, and avibration dam nthe combination of ,a coil spring interposed rts and a vibration dam ererefor-inc uding a ring intween one end of the 5 ring and one of parts, and having dependent spring ngues exertm g an mwar ressure so against the'coils of said'spring. p

- the combination with acoil spring interposed el thea 1 l n s ii th sprm'g emen nnatera ai' e ll coils of said spring t yieldingly deflecticnthereo. I

9. In a device of the character described the oombinationof a coil spring interposed between relatively movable parts, and means no to exert a yielding tension inst the coils of said spring to maintain t em against vibration.

8. In a device of the character 10. In a device of the character described,

the combination of a coil s ring interposed between relatively movab e parts, and a 

